"This weekend I was sitting with Donnie ... and he went into the other room and out came Evan with a card that said 'Will' and he handed it to me," she said. "Then Evan ran away and Evan came in with a card that said 'You.' ... I just started crying and then Evan came back into the room with the word 'Marry' -- but spelled wrong."

McCarthy quickly figured out what was going on.

"The last time, Donnie came out with Evan and Donnie's shirt said 'Me' ... and he got down on his knee," she added.

ABC

PHOTO: While hosting "The View" on April 16, 2014, Jenny McCarthy announced that she is engaged to Donnie Wahlberg and showed off her engagement ring.

McCarthy said she didn't even have to think about an answer.

"Of course, I said 'Yes,'" she said. "In that moment Evan yelled, 'I have another dad!' and it made all of us cry."

McCarthy added that she feels "like the luckiest girl in the world. "He's so wonderful," she said.